Collapsible centering.



H. H. FRICK.

COLLAPSIBLE CENTERING. I APPLICATIQN FILED AUG.6. 1915. 1,178,712, I Patented Apr. 11,1916.

2 sums-sun I.

Witnesses Inventor Attorneys 'l'HB WLUMBM PLANOORAPH $0., WASHINGTON, D. C.

- I I W W by HI HI Patented Apr. 11, '1916.

2 SHEETS SHEET 2.

' I I I Witnesses v Inventor.

Attdfneys 1H8 COLUMBIA PLANooRAFN cm, WASHINGTON, D. C-

HENRY H. ERICK, 'orirmcxs. r-nliuvsvztvinwia.

V C OLLAPSIBLE CENTERING'.

, To all whom it may) concern 7 Be it known that I, V cltizen of the United States; residing at v Fricks, in the county'fof Bucks and State of i 5 Pennsylvania,

' 'The device forming the'subjectmatter of 7 this application is adapted to be employed for supporting a collapsible form of the'sort V commonly used in connection with concrete shown in have lnventeda new and useful Collapsible Centering, of which the following is a specification; j

operations.

The lnventlon aims to pI'OVld novel 'means whereby a collapsing of such aform i may be brought about readily, and to pro: 'vide novel means whereby the form may be maintained in a distended condition. a I

Itis within the province of present invention appertains;

V Wi h be abovea nd other objects view which will appear, as thedescriptionpro-1 ceeds, the invention resides in the combinadetails of construction hereinafter described and; claimed, changes in the ventionherein I the scope of. what is claimed, without departing from the ,spirit'of the invention In the accompanying drawings t -Figure 1 shows-in sideelevation, a portionof asupporting arch fora concrete mold',"in'which the present .invention has been embodied;

Fig.2isa V Fig. 1; Fig. 3 is a perspective showingone of the. skewbacks; Fig'. 4 is a perspective showing one. of the voussoirs;

Fig.5 is aperspectiVe showing one of the heads which constitutes a part of the "tie Fig. 6 is a perspective showing the operating shaft Fig. Ti-is, a perspective delineatin' 'gv another head of the tie; Fig. 8 is' an end eleva tion showinga modified form of the inven- ,tlOIl; Fig. 9 1s an elevat on showing one of 10 is an elevationshowing the connection mp ye showing one end of the standard'as employed in Fig. 8; Fig.;l2 is an end elevation showing a modified form of the invention, the structure inFig. '12 being viewed from an opposite end, as compared with Fig-8;

Specification of Letters Patent. I

HENRY H. FRiCK, a

p the disclosure to improve generally and to enhance'the utility of devices of that type to which the tion and arrangement, of. parts andfin" the it, being understood that.

precise embodiment of the in-v disclosed can be made within ho'rlzontal section of: the structure,

he elementsfemployed in that form of the; invention which is disclosed in Fig.8; Fig.

inthat form of'the" inyention'ap-' pearing 1n 8; Fig.1'1 is an elevation elusive, there is shown afpair of skewbaclis 1' and 2f each gcomprising a base and a-i. socketehaving circular openings 5. It is" contemplated that the'rinvention as disclosed L Patented Apr. 11 ,'1*91e. j Application fileaa u sta'ie t. seriamaaaoeofi the accompanying -drawingsf and re- I I .ferringzpartlcnlarly to Figs. lgto 7 both inin "Figs. its 7 shall be used in connection with; a supportingarch .ofthat. sort'whichis' l i which reference ma profitably be had. I' The arch comprises terminal vouss oir's 6 of such 1 across section as to fit closely but slid'ablyjin the socket' l the voussoirs' 6 comprising an angularly disposed, arm 7 provided with The lIiVGIlfiOIiCOIIlPIlSGS a voussoir9 off i the sort shown in my prior patent above alludedto the same comprising arms 10 be.

'the;.vo ,ussoirs 9. and6,}the pivot element begf openingsffi in thesocket fl.

'18;'one of whichi'is shownin detail inFig.', 6. Theshaft 1'8 comprisesa flattened'stem '19, g the edges ofwhich a re rounded as shownf'at i '20 to conform to ,thefcurvature" of the openings'5 and 17,-the'stemf19 of thesh'aftbeing' I of.sucha thickness that it maybeslidably larged head ,2lhaving notches 22, so that the be engaged by J nates in a'boss 2 3 s u1tablyf shaped to receive a wrenchor other rotating. tool (not shown) jFrom the foregoing description it will be one end,the shaft v18 is equipped with an en i j a H p '100j head eonstitutes a-ratchetwheel adaptedto I pawl 2 p vo d, at o eachf' kewback '1-.: 2. "1The head 21 termi:-

obvious that when :wthe flattened'stem 19 9f f Itheshaft 18 is located in the opening 17 0f the voussoir 6 and in the openings 5 iofthe' 'skewba chi and "stands crosswise of the-Sf slot" 3 1 qus' r'si a n mere QW Y W 5, and c nseq e y; the ar h; of "wh ch they V I i openmgsB. Inthe voussolr 6 ntermediate, its'ends 1s formedan opening 12.'

tweenwhich thear'm7 of the terminal vous-' SO11" 6 extends, A pivot element 11 unites A wrench may be applied to the squared boss 23 to secure a rotation of the shaft 18.

posite structure.

whereupon the flattened stem 19 of the shaft 18 will be so disposed that its longer dimension will stand vertically. Under such circumstances, the flattened stem 19 is received ,in the slot 16 0f the terminal voussoir 6, and

then the arch will be collapsed'as the terminal voussoirs 6. move downwardly. When the flattened stem 19 of the-shaft 18stands crosswise of the slot 16 and is located in the opening 17, an accidental rotation of the shaft and a consequent collapsing of the arch may be avoided by engaging the pivoted pawl 24 in any of thenotches 22 of the ratchet head 21.

' In connection with each pair of vou'ssoirs opening 50, represented in Fig. 3 by the opening 5. A support is assembled with 'the casing 36, the support taking the place 1.2 thereisemployed a tie, which is a com.-

26, shown in Fig. 7, the head having a longitudinal slot 27 and a. terminal, circular opening 28 of approximately the same size as the openings 5 and 17 in the skewback and in the terminal voussoir respectively. The head 26 terminates at one end in a tubular socket 29 carrying a set screw 30. The socket 29 is adapted to receive one end of an intermediate section31 of the tie, the section 31 being in the formof a rod or bar, the end of which is adapted to beheld adjustably by the set screw 30. The other end of the section 31 of the tie is flattened and'is received between bifurcations 32 of a head 33 shown in Fig. 5, the extremity of the intermediate section 31 being held. to the bifurcations 32 by means'of apivot element 34. The head ,33 is equipped witha longitudinal slot 35.

The effective length of the tie is regulated by loosening the set screw 30 and adjusting one end of the intermediate section 31 in the socket 29. I J p In practical operation, the flattened stem 1 90f the shaft 18 in the skewback 2'is received in the slot 35 formed in the head 33 of the tie. The flattened stem 19 of'the shaft 18. on the skewback 1 is rotatably received in the opening 28 of the head26 of the tie. When the shaft 18 of the skewback 2 is rotated. the head 23 will act as a crank arm and will increase or diminishthe effective length of the tie.

If it is'desired to rotate both of theshafts 18 to. effect a collapsing of the arch thenthe tie must be slid off the flattened stems 19 of both shafts 18. If it is desired to collapse the arch by rotating that shaft 18 which is mounted inthe skewback 1, such an operation may bebrought about, since the flattened stem 19 of the shaft 18 in the skewhead 26 of the tie. g

It is possible to lodge the flattened stem 19 of the shaft 18 in the skewback 1, in'the slot 27 of the head 26 of the tie. Under such back 1 is journaled in the opening 28 of the The tie embodies a head circumstances, both shafts will be prevented from rotatlng, the flattened shanks or stems 19 of the shafts standing crosswise of the slots 16 of the vousso1rs 6, and being located 1n the. enlargements 17 of the sa1d slots. Therefore, at tunes, and at the W111 of an operator, the tie may be used for preventing a rotation of the shafts 18 and aconsequent collapsing of the arch.

In Figs. 8, 9, 10 and 11 there is shown a modified form of the invention, in which there appears a circular, metallic casing 36, the longitudinal edges of which are overlapped and slidably connected as shown at 37. Assembled with thecasing 86is a standard 38 which corresponds to the skewback 2, the standard embodying a socket 39, corresponding to the socket 4, the socket having an 48 corresponding in function to the head 83.

The shaft 46 is held against rotation by means of a pawl 4'1 pivotedto the socket 39 of the standard 38. Linked?) are pivoted at their outer ends as shown at 44 tov the casing 36 and arepivoted attheir inner ends,

as shown at 45 to the extremities of the con nection 48. The operation of the structure above described, need not be gone into inv detail, in view of what has been stated hereinbefore in connection with that form of the invention appearing in Fig.v 1. It will be understood, however, that when the shaft 46 is rotated, the support 40 will be permitted 'to'telescope into the socket 39. the connection 48 being tilted on the head 33, to draw I.

the links 43 inwardly. In Fig.12 of the drawings a casing 51 appears, the same having itslongitudinal edges overlapped and slidably connected as shown. at 52. The standard is shown at 53 and is provided with a socket 54 receiving one end of the supportj55, thesame having a slot 56 corresponding to the slot 4l.' The connection appears at 57 and is provided with 13/11 elongated slotv adapted to receive the flattened portion 58 of the shaft, a plurality of links 59 being'pivoted to the casing 51 and to theconnection 57, Fig. 12 being introduced to show that the number of links may be increased or diminished as the exigencies of the proposed use may demand, four links being'employed in Fig. 12, and two links in Fig. 8.

Reverting to that form of the invention which is shown in'Fig. 1, it will be understood that as many skewbacks 1 -2 corresponding parts as may be desired, may be mounted on the flattened stems 19 of the shafts 18, the shafts being of any desired length.

"If the shaft 18 is mounted in the circular opening 28 of the member 26, the arch may be collapsed without changing the space between the skewbacks;

Having thus described the invention, what 7 is claimed is r 1. In a concretemold,a socket; a mold supporting element slidable in the socket and provided with a longitudinal ,slot having an enlargement; and a shaft journaled' in the socket the shaft including a and provided with flattened stem rotatable in the enlargement to stand crosswise of the slot, thereby to up hold the mold supporting element, and ro- V tatable in the enlargement to be received in the slot, thereby to permit a telescoping of the mold supporting element into the socket. I

2. In a concrete mold, a socket; a mold supporting element slidable in the socket a longitudinal slot having an enlargement; a shaft journaled rotation. i 3. Ina concrete mold, a socket; a supportin the socket, the shaft including a flattened stem rotatable in the enlargement to stand crosswise of the slot, thereby to uphold the mold supporting element, and rotatable in the enlargement to be received in the slot, thereby topermit a telescoping of the mold sup'portingelementinto the socket; and. releasable means ing element slidable in thesocket and pro vided with an elongated slot having an enlargement; a shaft journaled in the socket and having a flattened stem rotatable in the enlargement to stand crosswise of the slot thereby to uphold the supporting element, and rotatable in the enlargement to Gopies of this patent may be obtained for five cents each, by addressing the for holding the shaft against" crank arm.

4:. Ina concrete mold,"a pair of skewbacks embodyingsockets; anarch including voussoirs' slidable in the sockets, the" vousf soirs being equipped with elongated slots stems rotatable in the enlargements to stand crosswise of the slots, thereby to support the'voussoirs, and rotatable in the enlargereceiving the flattened having openings to prevent a rotation of stems of the shafts the, stems. i 5.-In a concrete mold, apair of skewbacks, each including a socket; an arch'comprising voussoirs slidably received in the having enlargements; shafts journaled in p the voussoi'rs and fprovided with flattened I ments to be received in the slots; and 8/1716" sockets, the voussoirs having elongated slots 1 provided with enlargements; shafts journaled in the skewbacks and comprising flattened stems rotatable in the enlargements to stand crosswise'of the slots and rotatable in the enlargements tobe receiveda tie comprising pivotally in the slots and connected parts,

vide'd with an; opening receiving the stem I of'the other shaft to connect 'movement with said other shaft;

said part for In testimony, that I claim as myown, I

ture in the presence of two witnesses.

Witnesseszr W. S. BERGEY G. A. KULP.

Washington, I). G.

one of which is provided with an openingf-inwhich the stem of one" shaft is rotatable, the other of which is pro-c so the foregoing have hereto, aiflXed my signa- HENRY H. FnIoK Commissioner "of Yatents, l 

